Unable to call Netherlands from UK

[MPFJ]

We have an on-premises PBX running v20.0, using GoTrunk as our SIP.

I have disabled E164 and setup 4 outbound rules to allow domestic and international dialing (using 00 or + as a prefix).
This all seems to work and I can ring UK and various international countries (we've successfully tried USA, Australia, France, South Africa)

However, when I try to ring the Netherlands, the call rings 3 times then beeps to (?) indicate it can't connect and drops.
We have tried the US Embassy and a mobile number (+316xxx) and both fail.

Can anyone shed light on why the Netherlands might be different to all other countries?

The "Allowed Country Codes" has *everything* enabled but here's a screenshot showing the Netherlands is enabled.



Many thanks for any help ...

Mark J.

 

[MPFJ]

I have now enabled Verbose logging for a call and have lots of details.
The one thing that stands out is the entry:

Lsip{117086/75.2/UAC[SentInvite&OfferSent]} failure response to outgoing call:
InvOUT Recv 603/INVITE from 109.233.115.107:5060 tid=69192500eea6207d Call-ID=r1BM-b0N-WtvrxL_bDnOCA..:
SIP/2.0 603 Declined
Via: SIP/2.0/UDP 10.0.0.124:5060;received=217.155.177.136;branch=z9hG4bK-524287-1---69192500eea6207d;rport=5060
To: <sip:[email protected]>;tag=as6ab826f0
From: "441653310000"<sip:[email protected]>;tag=e54ce838
Call-ID: r1BM-b0N-WtvrxL_bDnOCA..
CSeq: 1 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Server: Media GW uk027
Supported: replaces
Content-Length: 0

I guess the "603 Declined" is the start of things going bad.
Should my <sip:[email protected]> have a "+" at the beginning, like the "To:" line?

 

[KyriacosS_3CX]

Talk to your trunk provider about what they expect to see and why the call was declined.

 

[MPFJ]

Thank you for the advice.
GoTrunk were blocking certain "high cost" EU countries ... this has now been lifted from our account and everything is now working fine.